If Keyboard Maestro freezes, locks-up or is exhibiting very strange behavior, check to see if you have [[https://​en.wikipedia.org/​wiki/​SIMBL|SIMBL]] installed in this folder:

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`/​Library/​Application Support/​SIMBL/​`

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**SIMBL** is very clever, but some of its extensions can lead to bizarre behavior, crashes, freezes and other strange, unexpected behavior in one or more apps or the macOS itself. ​ So if you have it installed, pretty much all bets are off as far as stability goes for your Mac. See [[https://​macremover.com/​uninstallguides/​2018/​06/​19/​remove-mysimbl-macos/​|How to remove mySIMBL and SIMBL in macOS]].